3

Possible infection:
You are young and need not be worried. This may reflect a bowel infection rather than diverticulitis or a chronic colitis. Avoid curtains foods with residue and increase your fluid intake vid no better in several more days consult your physician.
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4

Bloated:
Sounds like you are describing an umbilical hernia as bloating in response to eating. Some evaluation into the cause of your bloating is warranted such as food intolerance (lactose, etc). Also if the hernia is bothersome you can consider surgical repair.
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5

Specifics please:
In what position do you feel better/ worse? What is the quality of pain--sharp, stabbing, pressure, bloating, gassiness? Where in your abdomen (right, mid, left) do you experience discomfort? Duration pain lasts? Is pain deep or superficial? Have you seen blood with stool or change in bowels? Any chance of pregnancy (sexually active)? Any bladder/uti symptoms? Ur doc will need this info 2 help.
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7

Plain abdomen x-rays:
Show gas pattern, calcifications, bones, and some solid organs. Brief description of your symptoms suggest problem with stomach or gallbladder. Ugi series will show any thing that displaces barium contra, st inside the stomach and duodenum, and how they move the barium along. You might need further tests such as ultrasound to look at gallbladder and liver. Stick with your doctor's advice.
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8

Gastroparesis or ?:
Gastroparesis means a slow-emptying stomach. Causes may be mechanical (obstruction, or the stomach outlet narrowed from healing of past inflammation, treated by endoscopic dilation), post-inflammatory (due to swelling of the stomach lining from ulcers, treated with acid blockers), or neurologic (as with diabetes). By the way, any chance of an eating disorder?
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9

Gravity and diet:
Good question. Probably because all night long you are digesting food from previous day and in addition standing all day lon probably has the effect of allowing retained water to extend down with gravity's help to the lowest part of your abdominal wall where as at night it has a chance to clear. Change your diet, exercise, and watch your salt intake.
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10

Food intolerance?:
Food intolerances are amazingly common & very individualized. In one series, 10% of patients were intolerant of water! if you had celiac disease, we'd tell you to avoid gluten; if lactose intolerant we'd ask you to restrict milk products, so see if there is a common food you always consume & avoid it. If still suffering, then maybe stomach inflammation, dysmotility, or non-gi disease. See your doc.
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